Projectile Motion - AP Physics 1: Kinematics Review Supplement

This video tutorial reviews kinematics, focusing on its role in the AP Physics One curriculum. It covers the basics of projectile motion, including breaking down velocity into components and understanding free body diagrams. The tutorial includes solving multiple choice problems typical of the AP exam, emphasizing the importance of mastering these concepts for success. It also highlights the need to understand problems conceptually, using variables instead of numbers.

Why is kinematics considered the backbone of the AP Physics One curriculum?

• It is primarily about the study of electricity.

• It focuses on the study of thermodynamics.

• It helps in understanding motion graphs and vector components.

• It introduces students to the concept of energy.

At the peak of its path, what is true about a projectile's velocity?

• It has zero velocity in the Y direction.

• It has maximum velocity in the Y direction.

• It has maximum velocity in both X and Y directions.

• It has zero velocity in the X direction.

What is the horizontal acceleration of a projectile in motion?

• Depends on the angle of launch.

• Equal to the initial velocity.

• Zero.

• Equal to gravitational acceleration.

What force acts on a projectile in motion, assuming no air resistance?

• Gravitational and frictional forces.

• Only gravitational force.

• Gravitational and air resistance.

• No forces act on it.

In the absence of air resistance, what is the net force in the X direction for a projectile?

• Equal to the mass of the projectile.

• Equal to the gravitational force.

• Zero.

• Equal to the initial velocity.

What is the initial velocity in the Y direction for a ball rolling off a horizontal table?

• Equal to the initial velocity in the X direction.

• Zero.

• Equal to the gravitational force.

• Depends on the height of the table.

How does the horizontal speed of a ball on a table compare to its speed off the table, assuming negligible friction?

• It is greater on the table.

• It is less on the table.

• It depends on the table's height.

• It remains the same.

When solving projectile motion problems with variables, what is a key concept to remember?

• Use only the initial velocity in calculations.

• Ignore the effects of gravity.

• Focus on the relationships between variables.

• Always use numerical values for accuracy.

What mistake might lead to an incorrect answer in projectile motion problems?

• Using the wrong value for gravitational acceleration.

• Mislabeling the height in the problem.

• Ignoring the initial velocity in the X direction.

• Calculating the time of flight incorrectly.

Why is it important to let go of numbers dependency in physics problems?

• It simplifies the calculations.

• It helps in understanding the underlying concepts.

• It reduces the chance of calculation errors.

• It is required by the AP Physics exam.